Maybe I'm misinterpreting Apple's claims, but it makes sense that Power Nap would continue a time machine backup / app store download that is already in progress. When I close my 2012 MBA, my time machine hard drive stops blinking, so I can only imagine that the backup has stopped. Is this supposed to happen? Will Power Nap only initiate backups on a schedule? Or is this not how it's supposed to work? I installed the SMC update and checked the Power Nap box in energy saver. This can also become a thread about Power Nap in general since there doesn't seem to be one.